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GPU Comparison
AMD Radeon R9 390 vs ATI Radeon HD 3870 X2
AMD Radeon R9 390 vs ATI Radeon HD 3870 X2
VS
AMD Radeon R9 390
ATI Radeon HD 3870 X2
We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 and 512MB VRAM Radeon HD 3870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 390 's Advantages
Released 7 years and 5 months late
Larger VRAM bandwidth (384.0GB/s vs 57.66GB/s)
2240 additional rendering cores
ATI Radeon HD 3870 X2 's Advantages
Lower TDP (165W vs 275W)
Score
Benchmark
FP32 (float)
Radeon R9 390
+869%
5.12 TFLOPS
Radeon HD 3870 X2
0.528 TFLOPS
Radeon R9 390
VS
Radeon HD 3870 X2
Graphics Card
Jun 2015
Release Date
Jan 2008
Pirate Islands
Generation
Radeon R600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1500 MHz
Memory Clock
901 MHz
Memory
8GB
Memory Size
512MB
GDDR5
Memory Type
GDDR3
512bit
Memory Bus
256bit
384.0GB/s
Bandwidth
57.66GB/s
Render Config
-
SM Count
-
40
Compute Units
4
2560
Shading Units
320
160
TMUs
16
64
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
-
1024 KB
L2 Cache
256 KB
Theoretical Performance
64.00 GPixel/s
Pixel Rate
13.20 GPixel/s
160.0 GTexel/s
Texture Rate
13.20 GTexel/s
-
FP16 (half)
-
5.120 TFLOPS
FP32 (float)
528.0 GFLOPS
640.0 GFLOPS
FP64 (double)
105.6 GFLOPS
Graphics Processor
Grenada
GPU Name
R680
Grenada PRO (215-0880030)
GPU Variant
R680 XT (215-0708017)
GCN 2.0
Architecture
TeraScale
TSMC
Foundry
TSMC
28 nm
Process Size
55 nm
6.2 billion
Transistors
0.666 billion
438 mm²
Die Size
192 mm²
Board Design
275W
TDP
165W
600 W
Suggested PSU
450 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x S-Video
1x 6-pin + 1x 8-pin
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Features
12 (12_0)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3 (full) 4.0 (partial)
2.0
OpenCL
N/A
1.2
Vulkan
N/A
-
CUDA
-
6.3
Shader Model
4.1
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